Threshing-cylinder.



T. G. LEAVELL. THRESHING CYLINDER. APPLICATION FILED MAR.11, 1908.

925,358. Patented June 15, 1909.

WIT/VESSE INVENTOR ATTORNEY UNITED STATES PATENT OFFICE.

THOMAS G. LEAVELL, OF SPOKANE, WASHINGTON, ASSIGNOR OF THREE-FOURTHS TOORIHEUS O. SHAW, OF SPOKANE, WASHINGTON.

THEE SHING-GYLINDEB To all whom it may concern Be it known that I,THOMAS G. LEAVELL, a citizen of the United States, residing at Spokane,in the county of Spokane and State of Vashington, have invented certainnew and useful Improvements in Threshing-Cylinders, of which thefollowing is a specification.

This invention pertains to toothed-cylinders, of the kind adapted torotate upon a shaft and thresh wheat, oats and the like from straw.

The particular object of the invention is to provide a tooth bar thatmay be easily removed from the cylinder, for the purpose of setting andre-setting the teeth, and for other purposes. I accomplish this purposeby providing. the tooth-bars with tongues and lugs adapted to beretained by grooves and bearings in the cylinder. Pawls secured to thecylinder heads and operating against the tooth-bars assist in retainingthe tooth-bars in position during any reverse rotation of the cylinder.

In the drawings, Figure 1, is an end elevation of a cylinder, Fig. 2, isa side elevation of the same with the teeth removed, Fig. 3 is a sideelevation of the bearing in the cylinder adapted to receive the tongueand lug of the tooth-bar, Fig. 4, is a front elevation of the same, Fig.5, is an end elevation of the bearing in the cylinder, adapted toreceive the end of the tooth-bar and showing the pawl, Fig. 6, is anelevation of the end of the toothbar with a sectional View of thebearing in the cylinder, Fig. 7, is an end elevation of one of thetooth-bars carrying one of the teeth and Fig. 8, is a side elevation ofthe same.

The tooth-bar 10 is provided with tongues 11 and lugs 12 and thebearings 13 are pro vided with grooves 14 to receive the tongues 11 andshoulders 15 against which the lugs 12 Specification of Letters Patent.

Application filed March 11, 1908.

Patented June 15, 1909.

Serial No. 420,350.

press. This mechanism would be sufficient to retain the tooth bars 10 inthe rotation of the cylinder in the direction of the arrows, but wouldnot be sufficient in case of any rotation of the cylinder in theopposite direction therefore I have provided pawls 16 and riveted thesame to the cylinder heads 17 in such a manner that they will engage thenotches 18 in the teeth bars 10 on the oppo site side from the lugs 12,which, together with the lugs 12, serve as a substantial retaining meansof the teeth-bars 10 within their bearings 13 for all purposes includingthe rotation of the cylinder in either direction.

WVhen it is desired to move the tooth-bar 10, it is only necessary todisengage the pawl 16 from the notch 18 by the use of a finger of thehand or otherwise, and the bar may be drawn from its bearings and aseasily replaced and the pawl again thrown into its notch 18 and the baris again secure.

Having thus described my invention, what I claim as new and useful anddesire to secure by Letters-Patent, is,

A threshing cylinder consisting of tooth bars provided with tongues andlugs near the ends thereof cooperating with cylinder heads havingrecesses formed in their peripheries, the recesses adapted to receivethe ends of the tooth bars, and pawls riveted to the cylinder heads andadapted to engage the ends of the tooth bars, substantially asdescribed.

In testimony whereof I have afiixed my signature, in presence ofwitnesses.

THOMAS G. LEAVELL.

Witnesses:

B. It. KBATZER, E. S. FARNSWOTH, W. J. PARKs.

